//变量
$footer_height:1.43rem

//底部
.footer
    position: absolute
    bottom: 0
    background-color:#fff
    width: 100%
    height: $footer_height
    transition: transform .4s cubic-bezier(.55,0,.1,1)
    -webkit-transition: transform .4s cubic-bezier(.55,0,.1,1)
    box-shadow: 0 3px 14px 2px rgba(0,0,0,.12)
    -webkit-box-shadow: 0 3px 14px 2px rgba(0,0,0,.12)       
    .footer-item
        width: 25%
        text-align: center
        float: left  //使用浮动
        color: #999
        font-size: 0.32rem
        padding-bottom: 0.1rem
        padding-top: 0.12rem
        overflow: hidden
        .icon
            font-size: 0.6rem
    // 中间没空格，多类选择器，选择同时存在多个类的element
    .footer-item.active
        color: #ff6700


